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    • 8. 发明授权
    • Remotely-adjustable support apparatus and methods
    • 远程可调支持装置和方法
    • US07264226B2
    • 2007-09-04
    • US10750407
    • 2003-12-30
    • David C. SmithRonald D. Curl
    • David C. SmithRonald D. Curl
    • A62B3/00
    • F16M11/42F16M11/046F16M11/18
    • Remotely-adjustable support apparatus and methods are disclosed. In one embodiment, an apparatus includes a primary support and a secondary support moveably coupled to the primary support. The secondary support includes a cradle member adapted to engage the workpiece. The apparatus further includes a drive assembly operatively coupled to the secondary support and adapted to move the secondary support relative to the primary support. A control device is remotely positionable with respect to the drive assembly and operatively coupled to the drive assembly. The control device is adapted to transmit at least one control signal to the drive assembly to move the secondary support relative to the primary support.
    • 公开了可远程调节的支撑装置和方法。 在一个实施例中,装置包括主支撑件和可移动地联接到主支撑件的辅助支撑件。 辅助支撑件包括适于接合工件的托架构件。 该装置还包括可操作地联接到次级支撑件并且适于相对于主支撑件移动辅助支撑件的驱动组件。 控制装置相对于驱动组件可远程定位并且可操作地联接到驱动组件。 控制装置适于将至少一个控制信号发送到驱动组件以相对于主支撑件移动辅助支撑件。
    • 10. 发明授权
    • Voice activity detector
    • 语音活动检测器
    • US06556967B1
    • 2003-04-29
    • US09266811
    • 1999-03-12
    • Douglas J. NelsonDavid C. SmithJeffrey L. Townsend
    • Douglas J. NelsonDavid C. SmithJeffrey L. Townsend
    • G10L1520
    • G10L25/78
    • The present invention is a device for and method of detecting voice activity by receiving a signal; computing the absolute value of the signal; squaring the absolute value; low pass filtering the squared result; computing the mean of the filtered signal; subtracting the mean from the filtered result; padding the mean subtracted result with zeros to form a value that is a power of two if the result is not already a power of two; computing a DFFT of the power of two result; normalizing the DFFT result of the last step; computing a mean of the normalization; computing a variance of the normalization; computing a power ratio of the normalization; classifying the mean, variance and power ratio as speech or non-speech based on how this feature vector compares to similarly constructed feature vectors of known speech and non-speech. The voice activity detector includes an absolute value squarer; a low pass filter; a mean subtractor; a zero padder; a DFFT; a normalizer; and a classifier.
    • 本发明是一种通过接收信号来检测语音活动的装置和方法, 计算信号的绝对值; 平方的绝对值; 低通滤波平方结果; 计算滤波信号的平均值; 从滤波结果中减去均值; 使用零填充平均减去的结果,以形成一个值,如果结果还不是2的幂,则为2的幂; 计算两个结果的幂的DFFT; 归一化最后一步的DFFT结果; 计算正常化的平均值; 计算归一化的方差; 计算正常化的功率比; 基于该特征向量与已知语音和非语音的类似构造的特征向量进行比较,将均值,方差和功率比分类为语音或非语音。 语音活动检测器包括绝对值平方; 低通滤波器; 平均减法器 零pad 一个DFFT; 归一化器 和分类器。